This drama, wow, I have no words. I went into it thinking it would be a light-hearted comedy about a mom going back to school to get revenge on the kids that bullied her daughter but it's so much more than that. This drama seems light but actually has very dark undertones with themes of rape, murder, underage sex and pregnancy, teacher/student relationship(s), suicide, political agenda, corruption, etc. First the plot, the plot was really well thought out and I loved everything about it. All the characters had a purpose including the supposed and actual "villains" and all the actors did a fantastic job portraying them, so much that at the end I actually felt bad for some characters despite them having done heinous things. The relationships in this drama are truly what drive it despite this not being a romance at all really. First is the relationship between Ah Ran and Kang Ja (her mother/aka the angry mom), this relationship is like the backbone to this drama and represents the will that a mother had to do anything for her child. There are other relationships between the students, and some of the adults but I won't spoil that. What I will touch on is my favorite though, the friendship (and what could've been more) between Ah Ran and Yi Kyeong. This relationship has stuck with me the most and has made me so happy and so sad. A lot of people will take their relationship as just a friendship but the truth is we will never know. So if anyone has been searching for LGBT relationships in KDramas (which are literally slim to none so you have to take what you can get), I suggest watching this.